美军MUOS系统星上处理关键技术分析

Analysis on the Key Technique for Mobile User Objective System

移动用户目标系统（MUOS）是基于地面第三代合作项目——宽带码分多址（3GPPWCDMA）波形的新一代军事卫星通信系统，能够满足美军全球范围高性能战术卫星通信能力的需求。用户到基站（U2B）和基站到用户（B2U）信号在卫星天线和地面无线电基站之间的传输是通过Ka频段的上下行链路实现的。在简要介绍美军MUOS系统的组成和信息流的基础上，重点分析了MUOS系统星上处理过程中采取的速率变换、Had—amard矩阵处理、数字量化、TPC编码和调制等关键技术，为我国战术通信卫星系统的研制提供参考。

The Mobile User Objective System （MUOS） is a next generation military satellite communication system based on the terrestrial 3GPP WCDMA（3^rd Generation partnership Pro- ject-Wideband Code Division Multiple Access） waveform. The Mobile User Objective System can satisfy the U.S. military demand of global tactical communication with high performance. The transport of the user-to-base（U2B） and base-to-user （B2U） signals between its antennas and the RBSs located on the ground is provided by Ka-band uplink/downlinks. On the basis of thoroughly describing the structure of MUOS and its data flow, the key techniques of MUOS are analyzed, including rate matching, Hadamard processing, digital quantitative, TPC coding and module. What＇ s more, the further research trends of MUOS and what we can learn from it are presented.